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Note 3 - Business Combinations and Acquisitions (Details Textual) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended		12 Months Ended
	Jan. 31, 2024	Mar. 31, 2025	Sep. 30, 2024	Jun. 30, 2026	Jun. 30, 2025	Dec. 31, 2024
Proceeds From Return of Investment				$ 0	$ 41,000
Gain (Loss) on Asset Acquisition, Net				$ (0)	$ 5,000
Shanghai Lianheng Isocyanate Company Ltd. (“SLIC”) [Member]
Asset Acquisition, Consideration Transferred	$ 218,000
Proceeds From Return on Investment and Return of Investment		$ 41,000	$ 64,000
Proceeds from Dividends Received			34,000
Proceeds From Return of Investment			$ 30,000
Asset Acquisition, Costs						$ 0
Gain (Loss) on Asset Acquisition, Net	51,000	$ 5,000
Noncash Prepaid Asset Writeoff	$ 71,000

X

- Definition

Amount of costs related to asset acquisition.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
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Period Type:	duration

X

- Definition

Amount of gain (loss) on acquisition of assets, net.

+ References

No definition available.

+ Details

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Balance Type:	credit
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X

- Definition

Amount of write-off of prepaid asset.

+ References

No definition available.

+ Details

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Balance Type:	debit
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X

- Definition

The amount of cash inflow from a return of investment.

+ References

No definition available.

+ Details

Name:	hun_ProceedsFromReturnOfInvestment
Namespace Prefix:	hun_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

The amount of cash inflow from both a return on investment and a return of investment.

+ References

No definition available.

+ Details

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Namespace Prefix:	hun_
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X

- Definition

Amount of consideration transferred in asset acquisition. Includes, but is not limited to, cash, liability incurred by acquirer, and equity interest issued by acquirer.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 805
-SubTopic 50
-Name Accounting Standards Codification
-Section 55
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479908/805-50-55-1

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 805
-SubTopic 50
-Name Accounting Standards Codification
-Section 25
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480060/805-50-25-1

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 805
-SubTopic 50
-Name Accounting Standards Codification
-Section 30
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480027/805-50-30-1

Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 805
-SubTopic 50
-Name Accounting Standards Codification
-Section 30
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480027/805-50-30-2

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X

- Definition

Dividends received on equity and other investments during the current period.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 16
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-16

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Period Type: